Simon Cowell sat down with "Extra's"
Terri Seymour to reminisce about his time on "American Idol." He actually picked out his favorite moment, least favorite moment and what he thinks the future holds regarding Paula Abdul and "X Factor."

Favorite moment: "Fantasia singing 'Summertime.'"

Least favorite moment: "I think it was Clay Aiken singing 'Grease' ... with the red leather jacket. I think that was a low point."

What about Paula coming to "X Factor" now that she's signed on to go "Got to Dance" for CBS: "I don't know. I sent Paula a note because I knew that this was likely to happen. I sent her a note just saying that I was actually pleased somebody's built a show around her, it just proves her star power. Paula's a survivor. She's much smarter than people know. But what I said, and I literally mean this, I would welcome her on any of my shows any time."